Derrick



Patented Nov. 17, 1931 @PATENT OFFICE i FRED D. BEARLY, 0F OKLAHOMA CITY, OKLAHOMA Bismarck Application led February 13, 1930. vSerial 428,113.

My invention relates to derricks and more particularly to a sectional derrick leg including coupling means of novel construction for joining the legs and leg sections of a. derrick, the principal object of the invention being to provide for easy and quick connection and disconnection of the sections of individual legs and the assembly and disassembly of the legs in tlie erection or dismantling of' a derrick.

In accomplishing this and other objects` of the invention, I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein:

Fig. 1 is a fragmentary perspective view of a. leg joint from Within the derrick with parts broken away for better illustration of the coupling means for joining the leg sections.

Fig. 2 is a detail perspective view of the upper end of a leg section showing the girth coupling member attached thereto.

Fig. 3 is a. plan view of the girth coupling.

Referring in detail to the drawings:

1 and 2 designate abutting sections of a derriclr leg preferably constructed of angle iron and connected by an angle plate 3 secured to the outer side of the sections by means of bolts or like fastening means 4, the plate being provided at its corners with openings 5 for attachment of brace rods 6 leading to adjacent legs of tlie derrick (not shown).

Located at the upper end of each leg section is a coupling member 7 including cross arm portions 8 provided With squared ends 9 for attachment to the Walls of the leg scctions by Welding or the like, and adapted for cooperation With girth members 10.

The arm portions are provided with upwardly protruding side plates 11 connected by web plates 12 and forming transversely extending channels 13 for receiving the flat head portions 14 of the girtlis.

The-head portions 11i are provided With notches l5 for interlocking the girth mem'- bers, and at the lower end of each leg section is an abutment plate 16 engaging the upper edges of the head portions 14 and retainingV the members in the channels 13 'in assembled relation with the leg sections.

In assembling a derrick leg constructed as illustrated and described, the lower section of the leg is mounted on a suitable base WithV tlie girth coupling 7 and angle plate 3 attached toits upper end. The flat` head portions of the girths are applied inthe coupling channels With their notched ends interlocked and the opposite ends of the girths attached toadjacent legs ofthe derrick structure, The next higher section is thenplaced in position and rests on the upper edge of the lower leg section and is secured to the plate 3, the abutment plate 16 .65 resting on the upper edges of the girth heads 14. The next higher sections are then successively assembled on the leg as above described and the brace rods 6 connected with the angle plates and with adjacent legs' of the derrick structure.

What I claim and desire to secure by Letters Patent is:

1. A derrick leg including angular abutting sections, a connector member joining said sections, a coupling member on each section, and an abutment plate on each section cooperating with the coupling of an adjoining section for securing girth members thereto.

2. A derrick leg including angular sections arranged end to end, a connector plate joining said sections, a coupling member at one end of the sections having intersecting channels, and an abutment plate at the op-r posite end of the sections cooperating with the channels of adjoining coupling members for securing girth members therein.

8. In combination with a derrick leg including angular abutting sections, a connec; l9o tor plate joining the sections, coupling members on the upper ends of the sections having transverse grooves, girth members engaging said grooves, and abutment plates at the lower ends of the sections retaining said 95 girth members in said grooves.

' 4. In combination With a derrick legV including angular sections, a connector plate joining the Asections end to end, a coupling member at one end of the sections having icc intersecting grooves, girth members having interlocking heads engaging said grooves, and a retainer plate at the lower end of the sections retaining said heads in said grooves.

5. In combination with a derrick leg including angular sections, a connector plate on the outer side of theleg joining tl1e sections endfto end, couplingmemberson the upper ends of the sections and on the inner side of the leg having transverse grooves, girth members having interlocking head-portions engaging said grooves, and a retainer plate at the lower ends of the sections securing said head portions in said grooves.

6. In combination With a derrick Aleg including angular sections, va .coupling plate on the outer side` ofthe legconnecting said sections `end to end, ittings on the upper endsofthe sections and on the innerv side of the leg having intersecting grooves, girth members having flat head portions engaging said grooves, said head portions having notches interlockingthe girth members in said grooves, andretainer plates lon the lower ends ofv-.the sections engaging ,said head portions 1for retaining the girthmembers in assembled relation AWith said iittings.

Intestimony whereof I' aiiXl my signature.

FRED D. BEARLY. 

